When an NFL franchise is purchased by a new owner, it can sometimes have its fortunes around. New ownership comes with new ideas and new philosophies that may be more capable of building a winning culture within an organization that may not have been there before. Here are three NFL owners who elevated their new team to Super Bowl contenders after years of struggle before their purchase.NFL owners who turned around the fortunes of their newly purchased franchise#1 - Stan Kroenke, Los Angeles RamsLos Angeles Rams owner Stan KroenkeThe Los Angeles Rams have been a relatively successful franchise since the beginning, but a Super Bowl ring escaped them for a long time before their first win following the 1999 NFL season. Before that, they had made the playoffs many times but appeared in just one Super Bowl, which they lost.The Rams taking the next to become champions may have started when Stan Kroenke bought into the team. He purchased a 30 percent stake in 1995 and increased it to 40 percent in 1997. The Rams won their first ring in 1999 and returned to the Super Bowl again two years later.Sky Sports Premier League@SkySportsPLArsenal owner Stan Kroenke reacts to his LA Rams winning the #SuperBowl....82571073Arsenal owner Stan Kroenke reacts to his LA Rams winning the #SuperBowl....🐏https://t.co/DdwVN5AN2HKroenke bought out the rest of the Rams, becoming the full owner in 2010. Since taking over completely, the Rams have appeared in two more Super Bowls and won another ring.#2 - The Glazer Family, Tampa Bay BuccaneersTampa Bay Buccaneers owner Joel GlazerWhen the Glazer family purchased the Tampa Bay Buccaneers in 1995, they were one of the worst franchises in NFL history. In their 20 seasons before the Glazer's taking over, the Buccaneers recorded just three winning seasons.Tampa Bay Buccaneers@Buccaneers"Walking the streets of Tampa the Super Bowl week and the smiles on everybody's faces probably was the most meaningful in the whole run."🗣️: Buccaneers Owner/Co-Chairman Joel Glazer28327"Walking the streets of Tampa the Super Bowl week and the smiles on everybody's faces probably was the most meaningful in the whole run."🗣️: Buccaneers Owner/Co-Chairman Joel Glazer https://t.co/kK8iVZFcB9Everything changed for the Buccaneers after the Glazers purchased them. They suffered a losing season in their first year owning the team before starting a streak of success. Over the next six years, they never had a losing season, made the playoffs five times, and won their first Super Bowl in franchise history. They have won three more division titles and another ring since then.#3 - Robert Kraft, New England PatriotsNew England Patriots owner Robert KraftWhen Robert Kraft purchased the New England Patriots in 1994, they never won a Super Bowl ring and appeared in just one game in their franchise history. The franchise never won any championships, including during its time in the AFL before its merger with the NFL.Since Kraft purchased the team, they have appeared in ten Super Bowls and won six of them, the most by any team in NFL history. They have had just three losing seasons since Kraft took over and have established themselves as one of the greatest dynasties in sports history.